Finding the Fourth Proportional to 67.05, 92.50 and 42.17

Step by Step Solution

1. Step 1: Write the proportion equation
   67.05 : 92.50 = 42.17 : x
2. Step 2: Convert to fraction form
   67.05/92.50 = 42.17/x
3. Step 3: Cross multiply
   67.05x = 92.50 × 42.17
4. Step 4: Simplify right side
   67.05x = 3,900.05
5. Step 5: Solve for x
   x = 3,900.05/67.05
6. Step 6: Final answer
   x = 58.17